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Inventories
9 Months Ended
Sep. 29, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories are stated at the lower of cost or net realizable value. Cost is determined using the first-in, first-out method. Finished goods and work-in-process inventories include material, labor and manufacturing overhead costs. A summary of inventories is shown below (in millions):
 
September 29,
2018
 
December 31, 2017
Raw materials
$
928.4

 
$
869.3

Work-in-process
120.2

 
120.8

Finished goods
355.6

 
324.8

Reserves
(119.0
)
 
(109.2
)
Inventories
$
1,285.2

 
$
1,205.7